Implement AppSync (#1102)

* basic service setup

* add operations

* add missing operation

* add to symfony bundle

* added first tests

* removed updateFunction and added tests

* added some doc and regenerated code

* Fix psalm and cleanup doc

Co-authored-by: Jordi Hendrix <jordi@oberon.nl>
Co-authored-by: Jérémy Derussé <jeremy@derusse.com>

Author: 3 people

src/DependencyInjection/AwsPackagesProvider.php

@@ -9,6 +9,10 @@ class AwsPackagesProvider
     public static function getAllServices(): array
     {
         return [
+            'app_sync' => [
+                'class' => \AsyncAws\AppSync\AppSyncClient::class,
+                'package' => 'async-aws/app-sync',
+            ],
             'cloud_formation' => [
                 'class' => \AsyncAws\CloudFormation\CloudFormationClient::class,
                 'package' => 'async-aws/cloud-formation',